Previously, all users who placed an order using the shopping cart were required to create an account with an email address and password. Enabling Guest Checkout on your website allows users to bypass the account creation process and “Continue as Guest”. Read more.
2. Facebook Sign In

When enabled, your users can optionally sign in using their Facebook login.Read more.

3. Custom Payment Methods
Do you collect extra information at checkout such as PO # or Chargeback #? Custom fields at checkout can now be marked as optional.